Problem whit BR-6104K and newest firmware

Hi, I upgraded firmware to newest AMILDA firmware. Run fine, since I change LAN IP to 192.168.2.1. I needed that because My server PC is configured for that IP's. Ok I pressed change button. It takes a long time, so I closed My browser and restarted router, because after that it don't responds on 192.168.1.1 or 192.168.2.1. After restarrt the same. IP Configs shows DHCP server is configuring computers to 192.168.2.x, but DNS server and Gateway is 192.168.1.1 (Or oposite, I don't remenber correct, because then was 6AM, and Im using My main PC as gateway. )

Ok, can someone tell me how can I go in to My router? Is there some default IP that firmware is using when error accured? Im not blaming AMILDA team, That was My fault.